Ajuste del modelo de Drucker Prager extendido para la simulación de la respuesta mecánica de un vertisol mediante el método de elementos finitos

La mecanización de las labores del suelo es la causa, por su consumo energético e impacto directo sobre el medio ambiente, que más afecta a la degradación y pérdida de productividad de los suelos. Entre los factores de disminución de la productividad se deben considerar la compactación, la erosión, el encostramiento y la pérdida de estructura. Todo esto obliga a cuidar el manejo agrícola de los suelos tratando de mejorar las condiciones del suelo y elevar sus rendimientos sin comprometer aspectos económicos, ecológicos y ambientales. En el presente trabajo se adecuan los parámetros constitutivos del modelo de Drucker Prager Extendido (DPE) que definen la fricción y la dilatancia del suelo en la fase de deformación plástica, para minimizar los errores en las predicciones durante la simulación de la respuesta mecánica de un Vertisol mediante el Método de Elementos Finitos. Para lo cual inicialmente se analizaron las bases teóricas que soportan este modelo, se determinaron las propiedades y parámetros físico-mecánicos del suelo requeridos como datos de entrada por el modelo, se determinó la exactitud de este modelo en las predicciones de la respuesta mecánica del suelo, se estimaron mediante el método de aproximación de funciones de Levenberg-Marquardt los parámetros constitutivos que definen la trayectoria de la curva esfuerzo-deformación plástica. Finalmente se comprobó la exactitud de las predicciones a partir de las adecuaciones realizadas al modelo. Los resultados permitieron determinar las propiedades y parámetros del suelo, requeridos como datos de entrada por el modelo, mostrando que su magnitud está en función su estado de humedad y densidad, además se obtuvieron los modelos empíricos de estas relaciones exhibiendo un R2>94%. Se definieron las variables que provocan las inexactitudes del modelo constitutivo (ángulo de fricción y dilatancia), mostrando que las mismas están relacionadas con la etapa de falla y deformación plástica. Finalmente se estimaron los valores óptimos de estos ángulos, disminuyendo los errores en las predicciones del modelo DPE por debajo del 4,35% haciéndelo adecuado para la simulación de la respuesta mecánica del suelo investigado. ABSTRACT The mechanization using farming techniques is one of the main factors that affects the most the soil, causing its degradation and loss of productivity, because of its energy consumption and direct impact on the environment. Compaction, erosion, crusting and loss of structure should be considered among the factors that decrease productivity. All this forces the necessity to take care of the agricultural-land management trying to improve soil conditions and increase yields without compromising economic, ecological and environmental aspects. The present study was aimed to adjust the parameters of the Drucker-Prager Extended Model (DPE), defining friction and dilation of soil in plastic deformation phase, in order to minimize the error of prediction when simulating the mechanical response of a Vertisol through the fine element method. First of all the theoretic fundamentals that withstand the model were analyzed. The properties and physical-mechanical parameters of the soil needed as input data to initialize the model, were established. And the precision of the predictions for the mechanical response of the soil was assessed. Then the constitutive parameters which define the path of the plastic stress-strain curve were estimated through Levenberg-Marquardt method of function approximations. Lastly the accuracy of the predictions from the adequacies made to the model was tested. The results permitted to determine those properties and parameters of the soil, needed in order to initialize the model. It showed that their magnitude is in function of density and humidity. Moreover, the empirical models from these relations were obtained: R2>94%. The variables producing inaccuracies in the constitutive model (angle of repose and dilation) were defined, and there was showed that they are linked with the plastic deformation and rupture point. Finally the optimal values of these angles were established, obtaining thereafter error values for the DPE model under 4, 35%, and making it suitable for the simulation of the mechanical response of the soil under study.

Cobrança pelo uso da água e escassez de recursos hídricos: proposta de modelo de cobrança e aplicação na bacia do rio Atibaia

No Brasil, a Política Nacional de Recursos Hídricos apresenta a cobrança pelo uso da água como um instrumento de gestão de recursos hídricos de caráter econômico. Considerando esse caráter, a cobrança deve ter como objetivos: racionalizar o uso do recurso baseado na sua escassez; reconhecer a água como um bem de valor econômico, refletindo os custos ambientais advindos de sua utilização; e diminuir os conflitos entre os usos, induzindo uma alocação que considere o gerenciamento da demanda e as prioridades da sociedade. Além dessas metas, como instrumento de gestão de uma política que lista como primeiro objetivo \"assegurar à atual e às futuras gerações a necessária disponibilidade de água, em padrões de qualidade adequados aos respectivos usos\", a cobrança deve ser implementada de maneira que o agente usuário direcione seu comportamento no sentido da sustentabilidade ambiental. Mediante esses fundamentos, o que se pretende desenvolver neste trabalho é a aplicação de um modelo de cobrança sobre o uso da água que considera como princípio base a manutenção da qualidade ambiental medida pela adequada gestão da escassez de água e, compondo a busca dessa qualidade, a racionalização econômica e a viabilização financeira. Essa predominância do ambiente sobre aspectos econômicos vem no sentido de desqualificar argumentos segundo os quais, os impactos advindos dos usos da água serão corrigidos indefinidamente mediante investimentos financeiros em infra estrutura. Admitir que o desenvolvimento tem esse poder é supor equivocadamente que o meio econômico é limitante do meio ambiente e não o contrário. Esta constatação mostra qual é o problema da maioria das propostas de cobrança que valoram a água baseadas em custos de tratamento de resíduos e de obras hidráulicas. Por mais elaborados que sejam essas fórmulas de cobrança, chegando a ponto de se conseguir que fique mais caro, mediante um padrão ambiental corretamente definido, captar água ou lançar poluentes do que racionalizar usos, o preço da água não pode estar baseado em fatores cuja \"sustentabilidade\" pode acabar no curto prazo, dependendo do ritmo de crescimento econômico. A sustentabilidade dos recursos hídricos só será base da cobrança pelo uso da água se o valor cobrado for dificultando esse uso à medida que os recursos tornarem se escassos, e não quando os custos de medidas mitigadoras dessa escassez se tornarem muito elevados. Portanto, o modelo de cobrança proposto neste trabalho procura garantir que o agente econômico que está exaurindo o meio ambiente não possa ter capacidade de pagar por essa degradação, ajudando efetivamente a política de outorga do direito de uso da água na observância da capacidade de suporte do meio.

Desempenho econômico de um sistema de produção de biomassa da cana energia

O uso da biomassa como fonte de energia elétrica corresponde a uma alternativa de grande importância para o planejamento estratégico do crescimento econômico de diversos países. A vasta extensão territorial e o clima favorável ao desenvolvimento da agricultura no Brasil trazem como vantagem o poder de planejar sua matriz energética utilizando variadas fontes primárias renováveis. A cana-de-açúcar destaca-se pela rusticidade e grande produtividade. O bagaço como um subproduto resultante do processamento da cana é utilizado como fonte para a cogeração de energia e pode contribuir significativamente para a descentralização das fontes de energia nacional. Com o desenvolvimento da tecnologia de etanol de segunda geração, a busca pela maior produção de biomassa ganha relevância. Os programas de melhoramento identificaram que se caso com redução de 25 a 35% da sacarose na cana, a planta teria um potencial de aumento de mais de 100% da biomassa. Os híbridos derivados de programas de melhoramento da espécie Saccharum spp., direcionados exclusivamente para a produção de biomassa, foram denominados de cana energia. Tendo em vista o potencial de produtividade da cultura e consequentemente de geração de energia, torna-se necessário conhecer se esse potencial se traduz em resultado econômico. Com esse enfoque, o objetivo deste trabalho foi analisar a viabilidade econômica da produção de biomassa da cana energia. Para tanto foi desenvolvido um modelo em planilha eletrônica e o modelo foi empregado na simulação de cenários e alternativas. A planilha integra modelos de balanço hídrico, produtividade da cultura e distribuição de chuvas, e suas relações com aspectos econômicos e produtivos. O preço de venda da biomassa, a produtividade da cultura e a distância de transporte se mostraram como os itens que mais influem sobre os indicadores de viabilidade econômica. Diferentemente da eficiência gerencial, a eficiência de campo corresponde a um fator de grande importância a ser considerado para reduzir o custo de produção. A análise da área de colheita como uma variável crítica indicou que existem módulos ideais para a utilização de máquinas agrícolas, reduzindo o seu custo operacional devido ao uso melhor atribuído das máquinas na propriedade. A análise da textura do solo como variável crítica mostrou que o cultivo da planta em diferentes tipos de solos reflete em diferentes custos operacionais, produtividade potencial e no montante de investimento. O ano de reforma corresponde a um fator crítico para a viabilização da atividade. Para o cenário base, o indicador de atratividade financeira apresenta um Valor Presente Líquido de 6,4 milhões de reais e uma Taxa Interna de Retorno de 15,2%, com um horizonte de 20 anos de produção. As análises de sensibilidade mostram que as variáveis que mais impactam nos indicadores de viabilidade econômica financeira são o preço de venda da biomassa e a produtividade média da lavoura.

Cultura e desenvolvimento: o caso de São Tomé e Príncipe

A questão que nos propusemos analisar consiste em perceber como é que a cultura pode ser um fator de desenvolvimento e em que moldes se tem processado. Em primeiro lugar, procuraremos definir o conceito de cultura, tendo em conta as diferentes aceções que tem adquirido ao longo do tempo, para estabelecer o que é que hoje quer dizer “cultura”. No fundo, abordar de que maneira a área da cultura se interliga com outros domínios, tais como os direitos humanos, a educação, a economia, o ambiente. Também procurar debater de que modo estas áreas são fundamentais para a compreensão da noção atual de cultura e como interferem na questão do desenvolvimento. Além disso, abordaremos o papel fundamental das indústrias culturais e criativas para a compreensão do que aqui está em causa. Deste modo, daremos resposta a questões como a forma de a cultura poder ser um fator de criação de emprego, qualificação e formação e como pode ser um impulso à economia. Ao considerar que a cultura tem um caráter pragmático, lançaremos um olhar sobre a realidade de São Tomé e Príncipe, de que analisaremos os principais espaços de criatividade, as principais questões que se conjugam com o fator cultural bem como o papel que lhe é atribuído enquanto um elemento a ter em conta nas políticas públicas. Em suma, pretendemos perceber o que ainda é preciso ser feito, procurando aliar um dos pontos que constituem a chave da cultura em STP – a tradição – às exigências das novas abordagens no setor cultural.

O mercado da arte moderna e contemporânea em Portugal : 2005-2013

Tese de doutoramento, História (História de Arte), Universidade de Lisboa, Faculdade de Letras, 2016

A influência dos aplicativos móveis no negócio das empresas prestadoras de serviço de táxis em São Paulo: um estudo de caso

Este estudo pretende identificar as mudanças relevantes no mercado e qual o valor percebido pelos clientes e taxistas, considerando-se a inserção das empresas prestadoras de serviços de táxis da cidade de São Paulo no mundo virtual, através do uso de aplicativos. Para tanto, explanamos o conceito de cadeia de valor, incluindo cadeia de valor virtual e rede de valor, a fim de um melhor entendimento da estrutura em que se embasam as empresas desse novo ambiente, bem como explicamos os conceitos de modelo de negócio e Business Model Canvas. Com esse embasamento teórico propomos um framework com a finalidade de auxiliar o processo de extração e análise das informações que permitiram identificar as mudanças relevantes que ocorreram nesse mercado e o valor percebido pelos clientes e taxistas, fazendo uso de um estudo de caso. O tema é relevante, por se tratar de uma mudança significativa na forma como as empresas se relacionam com seus clientes e prestadores; e por permitir observar que valor agregado esse modelo tem propiciado, que fez com que cerca de 30 mil taxistas, dos 35 mil da cidade de São Paulo, optassem pelo uso de aplicativos, fazendo com que uma das empresas estudadas nessa dissertação atingisse mais de 2.5 milhões de downloads em todo o Brasil. Espera-se, com este estudo, identificar as mudanças relevantes que a inserção dos aplicativos trouxeram aos usuários e taxistas e apresentar um framework que pode ser utilizado como um facilitador na análise da cadeia de valor e cadeia de valor virtual do mercado de prestação de serviços de taxis, esclarecendo que esse modelo não é apenas um modismo ao qual se pode atribuir uma série de benefícios, mas, sim, uma tendência que está redefinindo o formato das empresas desse mercado.

UMA JUVENTUDE ORGANIZADA E NÃO-PARTICIPATIVA: UM ESTUDO DE CASO SOBRE UMA GESTÃO JOVEM EM SÃO BERNARDO DO CAMPO

Esta pesquisa estuda a existência e atuação de uma organização da sociedade civil em São Bernardo do Campo (SBC). A partir da utilização de ferramentas da participação cidadã, em especial a que constitui o Orçamento Participativo, ela analisa se e como esta organização se relaciona com os munícipes e com as esferas do poder executivo na busca por uma proposta de governo que atenda aos anseios daqueles a que representa, além das próprias aspirações. O estudo busca, através de um relato histórico, contextualizar o município pelos aspectos econômicos, políticos e sociais. A partir de levantamentos bibliográficos e acompanhamento, por meio de entrevistas, realizou-se um estudo de caso em uma entidade social não governamental que tem especial olhar sobre o jovem cidadão são-bernardense, a fim de verificar como esta entidade é planejada e gerida para atender às aspirações sociais destes. Espera-se, ao final, entender como uma organização da sociedade civil, em consonância com o que pretende para si mesma, reflete seus objetivos nas propostas e plenárias de Orçamento Participativo de SBC, realizadas em 2010 para o ano 2011.(AU)

Pesca artesanal entre mudanças socioambientais: estudo de caso na APA Bonfim-Guaraíra/RN-Brasil

Artisanal fishing is one of the important economic activities of Rio Grande do Norte (RN), becoming the main form of survival and income for many families. The southern coast of RN has strong fishing tradition, both in exploitation of fish as in the collection of mollusks on the banks of Guaraíra Lagoon (APA Bonfim-Guaraíra). In recent years, fishing communities have become more vulnerable to outside influences, since the socio-economic and environmental changes are exposed. These changes require adjustments to the fishermen to different environmental conditions, as the social and natural systems are driven by reorganization and upgrading processes. The living conditions in fishing communities are objective and necessary in different ways, according to a selection that is cultural, so adaptable. This study has the general objective to analyze the main environmental changes in fishing communities, based on the understanding of fishermen and mollusk fisherwomen about this problem. The specific objectives searched to: describe the socioeconomic profile, prospects and difficulties of fishermen and mollusk fisherwomen; investigate the major social and environmental changes in the fishing communities of Patané and Camocim (Arez/RN). The methodology was qualitative-quantitative with the techniques of observation in the field and open and semistructured interviews applied to representatives of Cologne fishing, fishermen and mollusk fisherwomen. Between the months of January to July 2014 were applied semistructured interviews with 41 interlocutors in Patané and 23 of Camocim; totaling 64 people. The results indicated that the interlocutors are aged 40 to 60 years; have only completed elementary school level; are married and have children; survive on less than a minimum wage income and they are not receiving employment insurance. The case study also revealed that the socioeconomic and environmental problems reflected in changes in reproduction, organization and social division of labor, which generates adaptive changes of families to external influences, resulting directly from other economic activities and market pressure and indirectly from tourism. Therefore, adaptations to changes scenario presented as favorable to economic aspects and unfavorable to the social and environmental aspects. In short, the fishery develops on technical, bureaucratic and financial obstacles, in the everyday needs of men and women is the determining factor in willingness to continue exercising fishing and shell fishing on Guaraíra Lagoon, space representing relations social, practices and customs transmitted in the course of local history through social memory of the oldest to the youngest.

Aplicação do exame da proporcionalidade diante da implantação de empreendimentos eólicos em áreas de preservação permanente

The setting up of wind power enterprises at Permanent Preservation Areas reflects the obvious conflict and necessary convergence between free market and energy security on the one hand, and the promotion of environmental quality on the other. From the perspective of energy sustainability, and in order to achieve development (in its complex meaning, which converges economic, social, environmental and cultural aspects), the harmonization between free market and an ecologically sustainable environment is required. This work aims to identify the link between the protection system of the Permanent Preservation Areas and the current constitutional order, by analyzing the implementation of wind power enterprises in these protected zones focusing on the proportionality aspects. A legal and purposeful research was developed, from a theoretical method, followed by collecting and analyzing both primary and secondary data. From these data, the law, the legal literature and judicial decisions were cross-examined, under the light of the Constitution and guided by the theory of proportionality and related development imperatives. In this context, the present study identified the link between the principles of the economic order, environment and energy law, finding their basis under the Federal Constitution and development. By reproducing this interrelationship and by means of post-crisis institutional reforms, the guiding objectives of the Brazilian electric sector began to corroborate the precepts of development, although issues regarding its sustainability still persist. The appraisal of proportionality indicates that the Permanent Preservation Areas protection system is insufficient to materialize the right to a healthy quality of life upon the implementation of wind projects at Permanent Preservation Areas, albeit seeking the harmonization between free market and environmental protection.

Aplicação do exame da proporcionalidade diante da implantação de empreendimentos eólicos em áreas de preservação permanente

The setting up of wind power enterprises at Permanent Preservation Areas reflects the obvious conflict and necessary convergence between free market and energy security on the one hand, and the promotion of environmental quality on the other. From the perspective of energy sustainability, and in order to achieve development (in its complex meaning, which converges economic, social, environmental and cultural aspects), the harmonization between free market and an ecologically sustainable environment is required. This work aims to identify the link between the protection system of the Permanent Preservation Areas and the current constitutional order, by analyzing the implementation of wind power enterprises in these protected zones focusing on the proportionality aspects. A legal and purposeful research was developed, from a theoretical method, followed by collecting and analyzing both primary and secondary data. From these data, the law, the legal literature and judicial decisions were cross-examined, under the light of the Constitution and guided by the theory of proportionality and related development imperatives. In this context, the present study identified the link between the principles of the economic order, environment and energy law, finding their basis under the Federal Constitution and development. By reproducing this interrelationship and by means of post-crisis institutional reforms, the guiding objectives of the Brazilian electric sector began to corroborate the precepts of development, although issues regarding its sustainability still persist. The appraisal of proportionality indicates that the Permanent Preservation Areas protection system is insufficient to materialize the right to a healthy quality of life upon the implementation of wind projects at Permanent Preservation Areas, albeit seeking the harmonization between free market and environmental protection.

“Escritores da liberdade”: histórias reais de jovens que cumpriram medidas socioeducativas em meio aberto no município do Natal/RN

Such work aims to analyze aspects of the lives of adolescents, authors of Infraction, after completion of the Socio-Educational Measures in Half Open (Probation - LA and Services to the Community - PSC) in the city of Natal / RN in 2010. Thus, it become necessary to point out and consider the socio-historical determinations that permeate the lives of these young men, estimating the economic, social, political and historical aspects. We understand that these individuals experience numerous expressions of Social Issues, such as lack of opportunities, violence, unemployment, among others. In the reduction context of the State actions for the social, and investments negligible in public policies. Thus, the research aimed to identify such determinations in the lives of adolescents, young people today, and aimed to know these adolescents and analyze the family situation, socio-economic and political these, after completion of educational measures; and to evaluate the inclusion in school life and in the labor market. Therefore, we used as a methodological way the qualiquantitative research, using the procedure of 4 (four) semi-structured interviews, 9 (nine) analysis processes by configuring so documentary research, through the analysis of reports, processes and monitoring documents. The universe of analysis went adolescents who fulfilled socio-educational measures in liberty in the city of Natal / RN. The sample consisted of nine (9) young, that we follow during the mandatory curricular training, in the period of graduation in Social Work at the Federal University of Rio Grande do Norte, in 2010. The time frame of the research took place between 2010 - 2014. The results of this study indicate that the solution to problems of violence is not the reduction of criminal majority. It is necessary to take actions in ensuring rights and allow other living conditions to the children and adolescents, because, in fact, in the society there is a tendency to regression of rights. We learn that, despite all the difficulties, as: low education, access to the labor market, low income, among others, young people interviewed understand the Socio-Educational Measures such as a watershed in their lives, because, they do not practice more illicit acts, they seek a better life, they have dreams and plans for the future, and they continue writing their histories.

“Escritores da liberdade”: histórias reais de jovens que cumpriram medidas socioeducativas em meio aberto no município do Natal/RN

Such work aims to analyze aspects of the lives of adolescents, authors of Infraction, after completion of the Socio-Educational Measures in Half Open (Probation - LA and Services to the Community - PSC) in the city of Natal / RN in 2010. Thus, it become necessary to point out and consider the socio-historical determinations that permeate the lives of these young men, estimating the economic, social, political and historical aspects. We understand that these individuals experience numerous expressions of Social Issues, such as lack of opportunities, violence, unemployment, among others. In the reduction context of the State actions for the social, and investments negligible in public policies. Thus, the research aimed to identify such determinations in the lives of adolescents, young people today, and aimed to know these adolescents and analyze the family situation, socio-economic and political these, after completion of educational measures; and to evaluate the inclusion in school life and in the labor market. Therefore, we used as a methodological way the qualiquantitative research, using the procedure of 4 (four) semi-structured interviews, 9 (nine) analysis processes by configuring so documentary research, through the analysis of reports, processes and monitoring documents. The universe of analysis went adolescents who fulfilled socio-educational measures in liberty in the city of Natal / RN. The sample consisted of nine (9) young, that we follow during the mandatory curricular training, in the period of graduation in Social Work at the Federal University of Rio Grande do Norte, in 2010. The time frame of the research took place between 2010 - 2014. The results of this study indicate that the solution to problems of violence is not the reduction of criminal majority. It is necessary to take actions in ensuring rights and allow other living conditions to the children and adolescents, because, in fact, in the society there is a tendency to regression of rights. We learn that, despite all the difficulties, as: low education, access to the labor market, low income, among others, young people interviewed understand the Socio-Educational Measures such as a watershed in their lives, because, they do not practice more illicit acts, they seek a better life, they have dreams and plans for the future, and they continue writing their histories.

Vernaculares: a casa de fazenda seridoense do século XIX como exemplo de adaptação ao clima semiárido

The farm’s rural dwellings of creation from the Seridó Potiguar microregion, built in the nineteenth century, became a reference by its vernacular character, i.e. these buildings, besides having recognized relevance to the identity of the region, they are adapted to the conditions of the place in many aspects (economic, cultural, construction, physical, et.) and consist in protective spaces in relation to hostile characteristics of Seridó’s climate. Considering the above premise, the following question arises: What characteristics of the nineteenth century Seridó Potiguar’s cattle farms are crucial for them to be a protective space in relation to the semiarid climate? In order to answer the question, this research aim to identify which particularities of the Seridó’s farmhouses that contribute to adaptability in these buildings to semiarid climate, as protection environments; and contribute to the stock valuation of the architectural heritage concerned. Therefore, procedures were adopted divided into two stages. Were first identified the recurring characteristics in the studied buildings, through typological study performed from existing inventories (DINIZ, 2008; FEIJÓ, 2002; IPHAN, 2012). To define the type it worked up with the concept that merges Durand’s analytical typology that identifies the similarities and differences to classify buildings, having the character of historical survey and architectural documentation, with the definition proposed by Argan (1963) that the type is not defined a priory, but the deduction from a number of illustrative cases which have formal and functional similarity with each other. Then worked up in a sample of five different types with each other, defined by the possibility of access to the interior of the houses, proximity to other copies, good state of conservation and preservation. The contemplated farms were: Pitombeiras, Agenus e Garrotes in Acari’s town, and the municipality of Caicó, Palma and Penedo. The second stage consists of the architectural survey, photographic record, digital three-dimensional modeling (aiming to expand the existing documentation and registration) and thermal monitoring over approximately a representative day in five farmhouses, relating the thermal performance of the houses with their individual characteristics. The selected variables for analysis monitoring are based on the thermal comfort adaptive model (SPAGNOLO and DE DEAR, 2003 apud NEGREIROS, 2010). The characteristics of the houses were analyzed as meeting the passive thermal conditioning strategies recommended by NBR 15220 (ABNT, 2005), for the bioclimatic zone 7 where the municipalities of Caicó and Acari are located. The house’s analysis of the operating temperatures revealed that 90% of the times of day the environments are within the comfort range. The farmhouses, which had a higher degree of compliance with recommended bioclimatic strategies, had the best thermal performance. In environments (usually the kitchen and rooms with low ceiling heights, exposed to west radiation) which still had discomfort hours, the thermal comfort can be reached with air movement approximately 1,0 m/s.

Vernaculares: a casa de fazenda seridoense do século XIX como exemplo de adaptação ao clima semiárido

The farm’s rural dwellings of creation from the Seridó Potiguar microregion, built in the nineteenth century, became a reference by its vernacular character, i.e. these buildings, besides having recognized relevance to the identity of the region, they are adapted to the conditions of the place in many aspects (economic, cultural, construction, physical, et.) and consist in protective spaces in relation to hostile characteristics of Seridó’s climate. Considering the above premise, the following question arises: What characteristics of the nineteenth century Seridó Potiguar’s cattle farms are crucial for them to be a protective space in relation to the semiarid climate? In order to answer the question, this research aim to identify which particularities of the Seridó’s farmhouses that contribute to adaptability in these buildings to semiarid climate, as protection environments; and contribute to the stock valuation of the architectural heritage concerned. Therefore, procedures were adopted divided into two stages. Were first identified the recurring characteristics in the studied buildings, through typological study performed from existing inventories (DINIZ, 2008; FEIJÓ, 2002; IPHAN, 2012). To define the type it worked up with the concept that merges Durand’s analytical typology that identifies the similarities and differences to classify buildings, having the character of historical survey and architectural documentation, with the definition proposed by Argan (1963) that the type is not defined a priory, but the deduction from a number of illustrative cases which have formal and functional similarity with each other. Then worked up in a sample of five different types with each other, defined by the possibility of access to the interior of the houses, proximity to other copies, good state of conservation and preservation. The contemplated farms were: Pitombeiras, Agenus e Garrotes in Acari’s town, and the municipality of Caicó, Palma and Penedo. The second stage consists of the architectural survey, photographic record, digital three-dimensional modeling (aiming to expand the existing documentation and registration) and thermal monitoring over approximately a representative day in five farmhouses, relating the thermal performance of the houses with their individual characteristics. The selected variables for analysis monitoring are based on the thermal comfort adaptive model (SPAGNOLO and DE DEAR, 2003 apud NEGREIROS, 2010). The characteristics of the houses were analyzed as meeting the passive thermal conditioning strategies recommended by NBR 15220 (ABNT, 2005), for the bioclimatic zone 7 where the municipalities of Caicó and Acari are located. The house’s analysis of the operating temperatures revealed that 90% of the times of day the environments are within the comfort range. The farmhouses, which had a higher degree of compliance with recommended bioclimatic strategies, had the best thermal performance. In environments (usually the kitchen and rooms with low ceiling heights, exposed to west radiation) which still had discomfort hours, the thermal comfort can be reached with air movement approximately 1,0 m/s.

Media diversity as a guarantee to cultural diversity: the promotion of identities from an international law approach

This article deals with several international instruments which provide legal guarantees for media diversity, which is essential for the promotion of cultural diversity. Based on several articles of the Convention of cultural diversity, the General Comment of the Committee on Economic, Social and Cultural Rights No. 21 on the right to take part in cultural life, as well as the work of the UN Independent Expert on Cultural Rights, this article aims to identify legal tools for the establishing of measures promoting cultural diversity in the media. This article looks at the case study of Honduran Garifuna community radios. It emphasizes the importance of taking into account the economic aspects of cultural and communicational rights.